Looking for Blender source code of version 2.79.7
The source code of blender is available in a git repository, as documented in the blender wiki, which explains how to build the code for your operating system:


  git.blender.org/blender.git


There is also a mirror of the code repository on github: https://github.com/blender/blender

The version tags may be used to navigate through history and pull the desired version.